Dezhou is not where the high-frequency earthquake occurred, but in the North China Plain, about 240 kilometers west of the Tanlu earthquake zone. Dezhou earthquake belongs to tectonic earthquake. The Tancheng-Lujiang fault zone is located on a strong compression and dextral torsion fault zone. Because of its large normal stress and shear stress, it is easy to accumulate the energy of large earthquakes, which are often released in the form of destructive earthquakes, so the earthquake intensity in this section is high and the frequency is low.